NEW YORK ( TheStreet) -- Here are this week's winners and losers.
Guggenheim Solar ETF ( TAN) -6.4% It has been a cloudy couple of weeks for the solar energy ETFs. Since the start of May, TAN has stuck to a steady downward path. Friday was a particularly rough day for TAN and Market Vectors Solar Energy ETF ( KWT). A poor earnings report from top 10 holding, Yingli Green Energy ( YGE), sent shares of the company spiraling nearly 10%. TAN is currently trading at March lows, while KWT has retreated back to levels seen at the start of the year. As we head into the new week, it will be interesting to see whether they can hold onto these levels. --Written by Don Dion in Williamstown, Mass.